daemon/archive.go: Fix copy routines to preserve UID.

This changes the long-standing bug of copy operations not preserving the
UID/GID information after the files arrive to the container.

Signed-off-by: Erik Hollensbe <github@hollensbe.org>

container_copy.go

@@ -38,6 +38,10 @@ func (cli *Client) CopyToContainer(ctx context.Context, container, path string,
 		query.Set("noOverwriteDirNonDir", "true")
 	}
 
+	if options.CopyUIDGID {
+		query.Set("copyUIDGID", "true")
+	}
+
 	apiPath := fmt.Sprintf("/containers/%s/archive", container)
 
 	response, err := cli.putRaw(ctx, apiPath, query, content, nil)